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Doping-induced in-plane anisotropy of bond-stretching phonon softening in oxychloride Ca$_{2-x}$CuO$_{2}$Cl$_{2}$ compounds

Lebert, B. W.; Yamamoto, H.; Azuma, M.; Heid, R.; Tsutsui, S.; Uchiyama, H.; Baron, A. Q. R.; Baptiste, B.; D´Astuto, M.

Abstract (englisch):
We measure the dispersion of the Cu-O bond-stretching phonon mode in the high-temperature superconducting parent compound Ca2CuO2Cl2. Our density functional theory calculations predict a cosine-shaped bending of the dispersion along both the (ξ00) and (ξξ0) directions, while comparison with previous results on Ca1.84CuO2Cl2 show it only along (ξ00), suggesting an anisotropic effect which is not reproduced in calculation. Comparison with isostructural La2−xSrxCuO4 and literature suggests that these calculations reproduce well the dispersion in the overdoped regime.

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DOI: 10.1103/PhysRevB.101.020506
Web of Science
Zitationen: 1
Zugehörige Institution(en) am KIT Institut für Quantenmaterialien und -technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 0163-1829, 0556-2805, 1050-2947, 1094-1622, 1095-3795, 1098-0121, 1538-4489, 1550-235X
KITopen-ID: 1000105231
HGF-Programm 43.21.01 (POF III, LK 01)
Quantum Correlations in Condensed Matter
Erschienen in Physical review / B
Band 101
Heft 2
Seiten Article: 020506
Nachgewiesen in Scopus
Web of Science
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